/*
 * Jopr Management Platform
 * Copyright (C) 2005-2009 Red Hat, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation, and/or the GNU Lesser
 * General Public License, version 2.1, also as published by the Free
 * Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License and the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and the GNU Lesser General Public License along with this program;
 * if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
package org.rhq.plugins.diameter.jbossas5.util;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

import org.jetbrains.annotations.Nullable;

/**
 * @author Ian Springer
 */
public class JBossConfigurationUtility
{
  /**
   * Returns an absolute {@link URL} representing the specified relative or absolute URL. Relative URLs are assumed to
   * represent local files and are resolved relative to the specified base directory. All file URLs are returned in
   * canonical form.
   *
   * @param urlSpec
   * @param baseDir
   * @return
   * @throws MalformedURLException
   */
  public static URL makeURL(String urlSpec, @Nullable File baseDir) throws MalformedURLException
  {
    if (baseDir != null && !baseDir.isAbsolute()) {
      throw new IllegalArgumentException("Base dir is not an absolute path: " + baseDir);
    }
    urlSpec = urlSpec.trim();
    URL url;
    try {
      url = new URL(urlSpec);
      if (url.getProtocol().equals("file")) {
        File file = (new File(url.getFile())).getCanonicalFile();
        url = file.toURL();
      }
    }
    catch (Exception e) {
      try {
        File file = new File(urlSpec);
        if (!file.isAbsolute() && baseDir != null) {
          file = new File(baseDir, urlSpec);
        }
        file = file.getCanonicalFile();
        url = file.toURI().toURL();
      }
      catch (Exception e2) {
        throw new MalformedURLException(e2.toString());
      }
    }
    return url;
  }
}